Cushion for water-pipes



(No Model.)

E J GALLAGHER CUSHION FOR WATER PIPES.l

Patented Nov. 30,1897.

mi?? Tof? l ion for water-pipes.

UNrTED STATES PATENT unica.

EDWARD J. GALLAGHER, OE LAFAYETTE, INDIANA CUSHION FOR WATER-PIPES.

SPECIFICATION forming part of Letters Patent N o. 594,787, dated November 30, 1897.

Application led August 12, 1897. Serial No. 648,065. (No model.)

To all whom, it may concern:

Be itknown that LEDWARD J. GALLAGHER, a citizen of the United States of America, residing in Lafayette, in the county of Tippecanoe and State of Indiana, have invented certain new and useful Improvements in Gush'- ions for Water-Pipes, of which the following is a specification.

The sudden stoppage of the iiow of water from a water-distributing pipe or system of pipes, as by the abrupt closing of a faucet, causes with the moving volume of water a concussion called water-hammer, which has a tendency tobreak or burst the pipe.

This invention relates to a cushion adapted to absorb the momentum of the moving column of Water and avoid the water-hammer.

The object of the invention is to provide a simple, effective, and economical device of this character which may be applied to any water-distributing pipe or system of pipes.

Figure 1 of the accompanying drawings represents a side elevation of this improved cush- Fi g. 2 represents an enlarged vertical transverse section thereof.

The same reference-numbers indicate corresponding parts in both figures.

A pipe-section 10 is designed for connection with a water-distributing system whereof the pipe 200, provided with a faucet 201, may constitute a part. The connection may be made in any suitable manner according to the material whereof the pipe 200 is composed. This pipe-section is provided at its out-erend with an external iiange 11 and also with an internal iiange 12, having a conical valve-seat 13. A pipe-section 20, adapted for connect-ion with the pipe-section 10, is provided with a screw-thread 21 at its inner end and with a screw-thread 22 at its outer end. A coupling-collar 30, having a flange 31, adapted to engage the flange 11 of the pipe-section 10, and a screw thread 32, adapted to engage the screw-thread 21 of the pipe-section 20, serves to couple said sections together. A cap' 40, provided with a screwthread 41, engages the screw-thread 32 of the pipe-sectiom20. This cap is provided with a reduced section 42', having a screw-thread 43 at its outer end. This contracted extension 42 is provided with an open chamber 48,

formed in the outer end thereof. A washer 50, preferably of brass, and a packing-ring are clamped between the outer end of the pipe-section 20 and the cap 40. A supplementary cap 70, provided with an internal screwthread '71, engages the external screw-thread 43 of the extension 42 of the cap 40 and shuts over the chamber 48, forminga stuffing-box around the valve-stem, a packing 30. being thereby compressed in'said box. This cap 70 is preferably provided with a hollow extension 72, in which the upper end of the valve-spindle piston-rod slides and by which it is protected from interference.

A valve-spindle, which also serves as a piston-rod, slides in the pipe-section 20 and extends through the cap 40 and stuffing-box 48 thereof into the hollow extension 72 of the supplemental cap 70. This combined valvespindle and piston-rod is preferably composed y of two sections disposed in alinement with each other, a valve-section and a shanksection 110. The valve-section 100 is provided at its inner end with a valve 120, of any suitable form, adapted to close against the Valve-seat 13 of the pipe-section 10. The valve herein shown is in l[he form of a conical ring surrounding a screw-threaded tang 101 on the pipe-section 10. This valve is preferably composed of rubber or other elastic and noiseless material and secured against the end of said section and a flange 102 thereon bya nut 103, screwed onto said tang. This valve-section 100 .is provided at its outer end with a socket 104, having an internal screwthread and an external iiange 105. It is also provided with an intermediate flange 106, which may serve as a guide for the spindle.

The outer or shank section 110 is screwthreaded at its innerend to fit the screwthreaded socket 104 of lthe inner or valve section 100, and it is provided with a iange 111, corresponding to the flange 105 on said socket. The outer end of this section extends through the washer 50 and packing-ring 60 and also through thestuffing-box 48 into the hollow extension 72 of the cap 70. The combined valve-spindle and piston-rod is provided with a piston 130, which 'is preferably clamped between the iianges 104 and 111 of' the two sections. This piston is preferably Ioo composed of a cup-shaped disk, of leather, rubber, or other suit-able flexible material.

A spring 140 is interposed between the iiange lll of the valve-stem section 110 and the washer 50 for closing the valve 120 against its seat.

The operation will now be described. XVhen the faucet 201 is closed suddenly in the water-pipe 200 or the current or flow of Water is otherwise suddenly checked, the pressure of water in the pipe causes the valve 120 to open, whereby the water is permitted to enter the pipe-section 20, and the sudden concussion or water-hammer is prevented. On the opening of the valve 120 the piston 130 on the combined valve-spindle and piston-rod causes the air in the outer end of the pipesection 2O to be compressed7 the packings 60 and SO preventing the escape of the air above said piston. As soon as the water gains its equilibrium the pressure of the compressed air in the outer end of the chamber 2O and of the spring 140 operates to push the piston 130, and consequently the piston-valve, downward in the pipe and closes the valve 120 against its seat. This piston prevents any entrance of water into the spring-cham ber. The chamber in the extended cap 70 permits a free passage ot' the valve-spindle. The construction of the valve, combined spindle, and piston in two parts enables it to be readil)T taken apart and facilitates the adjustment of the piston thereon. The flange 10G serves as a guide and prevents the wearing of the piston.

I claim as my inventionl. In a cushioning` device for a water-pipe, the combination of a pipe adapted to connect with the water-pipe and provided with a Valveseat, a combined valve-spin die and piston-rod.

disposed in said pipe, a valve on said rod adapted to close against said valve-seat, a stuing-box through which said rod passes, and a piston disposed on said rod between said valve and stufiing-box and adapted to form an air-cushion when the valve is opened which tends to close said valve.

2. In a cushioning device for a water-pipe, the combination of a pipe adapted to connect with the water-pipe and provided with a valveseat, a combined valve-spindle and piston-rod disposed in said pipe, a valve on said rod adapted to close against said valve-seat, a stufing-box through which said rod passes, a piston disposed on said rod between said Valve and stuffing-box and adapted to form an aircushion when the valveis opened which tends to close said valve, and a spring operating to reinforce the air-cushion and to hold said valve in closed position.

In a cushioning device for a water-pipe, the combination of a pipe adapted to connect with the water-pipe and provided with a valveseat, a combined valve-spindle and piston-rod disposed in said pipe, a valve on said rod adapted to close against said valve-seat, a piston on said rod, and a cap on said pipe provided with a stuiing-box and with a hollow extension inclosing the outer end oi' said rod.

4. In a cushion for a water-pipe, the combination of a pipe provided with a valve-seat, a combined valve-spindle and piston-rod, a valve thereon adapted to close against said seat, a piston also disposed on said rod above said valve, and a spring normallyT operating to close said valve.

5. In a cushion for a water-pipe, the combination of a valve-seat pipe-section adapted to connect with the water-pipe and provided with a valve-seat, a pipe-section adapted to connect wit-h said valve-seat pipe-section, couplings for uniting said sections, a cap provided with a stuffing-box, a rod provided with a valve adapted to close against said valveseat and with a piston operating in said pipesection, and a spring for normally closing and holding said valve in closed position.

6. In a cushioning device forawater-pipe, the combination of a pipe adapted to connect with a water-pipe, a valve-seat, a combined valve-spindle and piston-rod disposed in said pipe and comprising a valve-section provided with a valve at one end and a flange at the other end, a shank-section in line with the valve-section and provided with a flange, and a piston clamped between the flanges of said sections, and a cap for said pipe provided with a stufling-box for said rod.

7. In a cushioning device for a water-pipe, the combination of a pipe adapted to connect with the water-pipe and provided with a valveseat, a combined valve-spindle and piston-rod disposed in said pipe, a conical elastic valve on said rod adapted to close against said valve-seat, a stuiiing-box through which said rod passes, and a piston disposed on said rod between said valve and stuffing box and adapted to form an aircushion when Vthc valve is opened which tends to close said valve.

EDWARD J. GALLAGIIER.

Vitnesses:

XV. C. DARRow, R. A. IIAWKINS.

IOC 

